Sorry, my mistake. Try 'dig MX fqdn' where fqdn is the server that's got zimbar on - that should show if there's a correct MX record.
From your previous post:
Code:
australopitecus.*.net. 3600 IN MX 10 australopitecus.*.net.
it doesn't look right to me. I guess that 'australopitecus.*.net' is your domain name? It should read something like:
Code:
australopitecus.*.net. 3600 IN MX 10 svrname.australopitecus.*.net
or if 'australopitecus' is your servername then it should read:
Code:
*.net. 3600 IN MX 10 australopitecus.*.net
one of those formats should be correct depending on your domain name.
There's a description of the settings in the forums under a thread called "DNS in a nutshell", have a look at that and see if your DNS matches it. I am assuming this is a DNS server on your LAN? If you're behind a router you may need a split DNS setup and that's described in the wiki.